Number line

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Relationship between point and vector on the number line.

In mathematics lessons, a number line is understood to mean the visualization of real numbers as points on a straight line .

Number line with whole numbers highlighted

In the picture, the locations of the points of the whole numbers are highlighted by vertical lines.

The number line is an illustration of the one-dimensional Euclidean vector space . The illustration shows that the set of real numbers forms a linear order by means of the usual comparisons . The number line continues in both directions to infinity. The arrow on the right side of the graph indicates that the numbers will increase in that direction.

In class, a number line is used to illustrate the natural numbers .


The following figure shows the location of some special real numbers: the square root of 2, Euler's number, and the circle number .

Number line with some special numbers

See also

Web links

Wikibooks: Math for non-freaks: number line  - learning and teaching materials